5080 Undervolt/ Overclock thread: How low can you go?...

[wunkley]

(Posted this in the big thread but I think it deserves its own post. Mods slap me down if you must....)

I'm beating Jufes with my current work in progress undervolt/ overclock on my 5080 (MSI Gaming Trio). Got a graphics score of 35,140 in TIMESPY with a core voltage of only 0.97. Max power draw about 350w....

I scored 29 339 in Time Spy

AMD Ryzen 7 9700X, NVIDIA GeForce RTX 5080 x 1, 32768 MB, 64-bit Windows 11}

www.3dmark.com

With my less aggressive core volts of only 0.94 and max power draw of about 315w I'm pretty much matching....

I scored 28 945 in Time Spy

AMD Ryzen 7 9700X, NVIDIA GeForce RTX 5080 x 1, 32768 MB, 64-bit Windows 11}

www.3dmark.com

And, with only 0.91v(!) and max power draw of ~295w, getting 34,109....

I scored 28 576 in Time Spy

AMD Ryzen 7 9700X, NVIDIA GeForce RTX 5080 x 1, 32768 MB, 64-bit Windows 11}

www.3dmark.com

For ref in his vid he was doing a quick and dirty sliders only overclock in Afterburner but he was maxing out power to 375w and presumably volts were at 1.02 at least. Really quite impressed with these 5080s you know, especially the undervolting.

 

[haszek]

What core speed do you set your curve to, with those volts? I personally think it's pointless to try the highest level OC with curve. I get similar 35100+ just with setting core/mem OC and 365W, not worth messing around for 15-20W gain, especially that I had instabilities even if I set it to 1V (for some reason AB was showing 0.96V during test, not sure if there is some sort of offset).

I might play with some lower curves just to see the difference.

 

[r22snapper]

Lovely stuff. I'll join in when mine turns up, I always ran my 3090ti undervolted as it was such a power hog otherwise.

 

[r22snapper]

So I've been playing about in Afterburner with a couple of settings. Summer mode runs at just over 3GHz and 280 Watts using a +300 core, a +750 memory overclock and 80 power limit. Winter mode seems stable at a smidge under 3.3GHz, I've ramped up the power limit and used +425 on the core. In this mode it kicks out 360ish Watts and runs pretty close to 4090 performance in Flightsim.

It's an impressive card to be fair, fan noise is not really noticeable in winter mode and far from intrusive with the power ramped up. They do seem to have left an awful lot of performance on the table. There will definitely be a 5080 Super with more VRAM and a clock bump.

 

[r22snapper]

This is really early stuff, just messing with sliders, not curves. I'll do it properly when I've got some more time

 

[g60dubster]

Zotac Amp Infinity - +2000mem +400 core. runs at around 3125GHz and peaks at 288 watts.
getting 96fps on cyberpunk in 1440 on max settings with no frame gen)
get about 86 fps without overclock and same 80% power limit.

Need to play with power curve next....

 

[Awahwah]

I'm around +315 core, which sits at 3k Core. Is memory clocking worth it? I thought the 5080 was not limited by RAM bandwidth?

 

[Sparky]

I've undervolted mine down to a RTX 3070

 

[Ayahuasca]

Worth testing if ECC is kicking in with +2000mhz memory clocks. It will give nice gains in some benchmarks and a couple of specific games at the higher resolutions if stable.

I don’t think I’ve seen a 5080 yet that can’t do at least +300 on the core.

 

[Awahwah]

Worth testing if ECC is kicking in with +2000mhz memory clocks. It will give nice gains in some benchmarks and a couple of specific games at the higher resolutions if stable.

I don’t think I’ve seen a 5080 yet that can’t do at least +300 on the core.

Now on +430 (3.1G~). Seems fine.

 

[g60dubster]

Worth testing if ECC is kicking in with +2000mhz memory clocks. It will give nice gains in some benchmarks and a couple of specific games at the higher resolutions if stable.

I don’t think I’ve seen a 5080 yet that can’t do at least +300 on the core.

I'm still seeing where the best performance is, i think a lower memory clock will give a better yield as +2000 does seem extreme but it runs without errors.

 

[wunkley]

I've settled on +1400 on the memory at the moment on my undervolt/ overclock profiles. Tested at -500, +500, +1000, +1400 and +2000. 1400 seems to be the sweet spot on my card.

I'm using 3D Mark 'Steel Nomad' as my quick tests as it's free, punishing on the GPU, and quick to run. However I've noticed an oddity in that the first ever run you do will be the highest and if you run it again without closing down 3D Mark it scores about 2fps lower every time. Weird.

 

[Awahwah]

I've settled on +1400 on the memory at the moment on my undervolt/ overclock profiles. Tested at -500, +500, +1000, +1400 and +2000. 1400 seems to be the sweet spot on my card.

I'm using 3D Mark 'Steel Nomad' as my quick tests as it's free, punishing on the GPU, and quick to run. However I've noticed an oddity in that the first ever run you do will be the highest and if you run it again without closing down 3D Mark it scores about 2fps lower every time. Weird.

But have you seen much of an increase in pref with memory clocks?

 

[wunkley]

But have you seen much of an increase in pref with memory clocks?

Not a huge amount but some yes. A few extra fps at around +1400, any higher than that no gains. And doing minus 500 on the memory which I've seen some suggest can help with core overclock and performance didn't help and had worse performance (as you might actually expect).

I should point out this is only testing in 3D Mark Steel Nomad. Results may differ in other benchies and games.

 

[Bidley]

I've got power limit maxed at 125%. +500 on the core will run a few Steel Nomad tests but isn't quite stable in games.

I've settled on +470, undervolted at 0.970v which gets around 3100mhz. Temps hover around 60c with the stock fan curve, using about 300w. Once I go below 0.940v performance starts to drop (only single digit FPS, mind). Around the 0.950-980v mark seems the sweet spot.

I've got the memory at +1000, but I can't seem to see any benefit. +1500 didn't seem to do anything for me.

 

[wunkley]

I've got power limit maxed at 125%. +500 on the core will run a few Steel Nomad tests but isn't quite stable in games.

I've settled on +470, undervolted at 0.970v which gets around 3100mhz. Temps hover around 60c with the stock fan curve, using about 300w. Once I go below 0.940v performance starts to drop (only single digit FPS, mind). Around the 0.950-980v mark seems the sweet spot.

I've got the memory at +1000, but I can't seem to see any benefit. +1500 didn't seem to do anything for me.

This is almost my exact findings with my current top undervolt/ overclock preset. Interestingly when using curve edit in Afterburner, even though it's set at 3200mhz core it drops to around 3100mhz in reality in gaming/ benchies. Although this is with my power limit at stock 100% so I thought that may be the issue. I don't want to increase the power limit above 100 really as it kind of defeats the purpose. The beauty of my (maybe all?) 5080 is that you can get a decent undervolt and big overclock at the same time.

What card you got with a power limit of 125%!? (My MSI gaming Trio only has 111%, which is higher than some)

With my preset mentioned above I get about 90fps score in Steel Nomad by the way, which is almost stock 4090 levels which is around 93fps I think. WIth a bit more tweaking it will go higher I'm sure. You can basically get stock 4090 performance on a tuned undervolted 5080. Yes you can't download or tune VRAM amount - **** off.

 

[Bidley]

This is almost my exact findings with my current top undervolt/ overclock preset. Interestingly when using curve edit in Afterburner, even though it's set at 3200mhz core it drops to around 3100mhz in reality in gaming/ benchies. Although this is with my power limit at stock 100% so I thought that may be the issue. I don't want to increase the power limit above 100 really as it kind of defeats the purpose. The beauty of my (maybe all?) 5080 is that you can get a decent undervolt and big overclock at the same time.

What card you got with a power limit of 125%!? (My MSI gaming Trio only has 111%, which is higher than some)

With my preset mentioned above I get about 90fps score in Steel Nomad by the way, which is almost stock 4090 levels which is around 93fps I think. WIth a bit more tweaking it will go higher I'm sure. You can basically get stock 4090 performance on a tuned undervolted 5080. Yes you can't download or tune VRAM amount - **** off.

No I found that exact same behaviour in Afterburner. Whatever you set the curve to, it boosts about 80-100mhz lower. It confused me for a long time but I guess it's either a quirk of the chip or Afterburner. I only set the power limit to max so it doesn't throttle - in reality, if you undervolt it with the curve it will use below 100%. The slider is pretty meaningless if you're using the curve.

I've got the Gigabyte Gaming OC. The 125% limit is pretty scary isn't it but I've never seen it use more than 110%. The card won't let you apply more than a certain amount of voltage (I'm not sure what it is) and it won't clock high enough to use it all. It will draw it in Furmark but that's about it.

I'm getting 88/89fps in Steel Nomad, so similar to you. There does seem to be diminishing returns above the 3.1-3.2ghz range. In fact over 3.2ghz seems to lose performance.

You really can get a meaningful performance gain if you overclock these. Looking forward to the 3.2ghz boost clock 24gb 5080 Super in 2026